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10 points!!! List 5 physical and 5 chemical properties of the element platinum.?
3 Answers
- kflan2000Lv 41 decade agoFavorite Answer
Chemical Properties of Platinum
* Electrochemical Equivalent: 1.8197g/amp-hr
* Electron Work Function: 5.65eV
* Electronegativity: 2.28 (Pauling); 1.44 (Allrod Rochow)
* Heat of Fusion: 19.6kJ/mol
* Incompatibilities:
Aluminum, acetone, arsenic, ethane, hydrazine, hydrogen peroxide, lithium, phosphorus, selenium, tellurium, various fluorides
* Ionization Potential
o First: 9
o Second: 18.563
* Valence Electron Potential (-eV): 92.2
Physical Properties of Platinum
* Atomic Mass Average: 195.08
* Boiling Point: 4100K 3827°C 6921°F
* Coefficient of lineal thermal expansion/K-1: 9E-6
* Conductivity
Electrical: 0.0966 106/cm ohm
Thermal: 0.716 W/cmK
* Density: 21.45g/cc @ 300K
* Description:
Silver white transition metal.
* Elastic Modulus:
o Bulk: 276/GPa
o Rigidity: 60.9/GPa
o Youngs: 170/GPa
* Enthalpy of Atomization: 565 kJ/mole @ 25°C
* Enthalpy of Fusion: 19.7 kJ/mole
* Enthalpy of Vaporization: 510.5 kJ/mole
* Flammablity Class: Non-combustible solid (except as dust)
* Freezing Point: see melting point
* Hardness Scale
o Brinell: 392 MN m-2
o Mohs: 3.5
o Vickers: 549 MN m-2
* Heat of Vaporization: 510kJ/mol
* Melting Point: 2045K 1772°C 3222°F
* Molar Volume: 9.09 cm3/mole
* Optical Reflectivity: 73%
* Pysical State (at 20°C & 1atm): Solid
* Specific Heat: 0.13J/gK
* Vapor Pressure = 0.0312Pa@1772°C
Regulatory / Health
* CAS Number
o 7440-06-4
* RTECS: TP2160000
* OSHA Permissible Exposure Limit (PEL)
o No limits set by OSHA
* OSHA PEL Vacated 1989
o TWA: 1 mg/m3
* NIOSH Recommended Exposure Limit (REL)
o TWA: 1 mg/m3
* Routes of Exposure: Inhalation; Ingestion; Skin and/or eye contact
* Target Organs: Eyes, skin, respiratory system
* Levels In Humans:
Note: this data represents naturally occuring levels of elements in the typical human, it DOES NOT represent recommended daily allowances.
o Blood/mg dm-3: n/a
o Bone/p.p.m: n/a
o Liver/p.p.m: n/a
o Muscle/p.p.m: n/a
o Daily Dietary Intake: n/a
o Total Mass In Avg. 70kg human: n/a
- Anonymous5 years ago
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